000019808 001__ 19808
000019808 005__ 20170118182337.0
000019808 04107 $$aeng
000019808 046__ $$k2017-01-09
000019808 100__ $$aHenriques, Jose
000019808 24500 $$aOptimal Design of Concentrically Braced Steel Frames in Moderate Earthquake Areas

000019808 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000019808 260__ $$b
000019808 506__ $$arestricted
000019808 520__ $$2eng$$aThe purpose of the present contribution is to summarize the results achieved in the frame of the research project MEAKADO funded by the Research Fund for Coal and Steel of the European Commission. The goal of this project is to develop specific design procedures for steel and steel-concrete composite structures in regions characterized by a low to moderate seismic activity, with an appropriate reliability level. The intention is to find an optimal balance between safety and economical concerns. Two parallel ways are proposed in this prospect. The first one is based on the exploitation of dissipative phenomena that are commonly not explicitly considered while the second one consists in investigating the possibilities of adequately adjusting the requirements imposed by existing seismic codes to better suit with the reality of moderate seismic risk. The objective of the proposed research action is to come out with an intermediate way of designing in which reduced but controlled amount of ductility is accounted for, providing thus the necessary safety with respect to uncertainties on the seismic action, but where the local ductility and structural homogeneity requirements are less stringent than designing according to Eurocode 8 – Ductility Class Medium principle, in order to focus on intermediate values of behavior factors. These requirements should be tuned according to the actual seismicity level of the area. The research program focuses on moment-resisting frames and concentrically braced frames. It comprises a combination of experimental and numerical studies and should result in proposals formulated according to a pre-standard format in the perspective of further revisions of the design codes. The project focuses exclusively on the two main structural types for ordinary steel structures, i.e. concentrically braced frames (CBF) and moment resisting frame (MRF). A very special focus is put on CBF as being the very most commonly realized in practice (80 to 90% of the steel structures really built are laterally braced by CBF at least in one direction) and as the most constrained by current Eurocode 8 rules due to the combined requirements on diagonal truss bars slenderness and homogeneity of overstrength all over the height of the structure.

000019808 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000019808 653__ $$aSteel structures, concentrically braced frames, low and moderate seismicity, moderate ductility, X and V bracings, bolted shear connections

000019808 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000019808 720__ $$aHenriques, Jose$$iMartin, Pierre-Olivier$$iKanyilmaz, Alper$$iCastiglioni, Carlo$$iCalderon, Inigo$$iDegee, Herve
000019808 8560_ $$ffischerc@itam.cas.cz
000019808 8564_ $$s653126$$uhttps://invenio.itam.cas.cz/record/19808/files/446.pdf$$yOriginal version of the author's contribution as presented on USB, paper 446.
000019808 962__ $$r16048
000019808 980__ $$aPAPER